deprecate confusing extension in favour of simpler ARC-complient method

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@39520 72102866-910b-0410-8b05-ffd578937521

Source/GSDictionary.m

@@ -338,6 +338,11 @@ static SEL	objSel;
     NSDefaultMallocZone()] initWithDictionary: self]);
 }
 
+- (BOOL) makeImmutable
+{
+  return YES;
+}
+
 - (NSEnumerator*) objectEnumerator
 {
   return AUTORELEASE([[GSDictionaryObjectEnumerator allocWithZone:
@@ -419,6 +424,12 @@ static SEL	objSel;
   return self;
 }
 
+- (BOOL) makeImmutable
+{
+  GSClassSwizzle(self, [GSDictionary class]);
+  return YES;
+}
+
 - (id) makeImmutableCopyOnFail: (BOOL)force
 {
   GSClassSwizzle(self, [GSDictionary class]);